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What does the nitrate do in a concentration cell?

Posted: Mon Feb 24, 2020 11:40 am
by Skyllar Kuppinger 1F
What is the point of the nitrate in this concentration cell?? (Image attached)What does it do? Does it keep the solution neutral? If so how?

Re: What does the nitrate do in a concentration cell?

Posted: Mon Feb 24, 2020 11:43 am
by Vicki Liu 2L
I believe nitrate is a spectator ion in this case. In other words, AgNO3 was dissolved to achieve Ag+ ions in solution but the NO3- is not involved in the actual reaction.

Re: What does the nitrate do in a concentration cell?

Posted: Mon Feb 24, 2020 12:01 pm
by sarahforman_Dis2I
Skyllar Kuppinger 1F wrote:What is the point of the nitrate in this concentration cell?? (Image attached)What does it do? Does it keep the solution neutral? If so how?


I believe that the nitrate keeps the solution neutral though balancing out the Ag+ ions. That is why there is a porous disk, think of it as a form of salt bridge, in that it allows for ions to move to balance charge. I hope this helps!

Re: What does the nitrate do in a concentration cell?

Posted: Mon Feb 24, 2020 2:18 pm
by CosetteBackus_4F
While the nitrate is not necessarily involved in the reaction itself, its purpose, like the salt bridge, is to allow ions to flow so that the charge can balance.

Re: What does the nitrate do in a concentration cell?

Posted: Mon Feb 24, 2020 2:36 pm
by Abhi Vempati 2H
Like everyone is saying, nitrate diffuses through the porous disk to balance the charges on both sides. The actual reaction that is occurring is for Ag+(aq) and Ag(s), but NO3- is important for the concentration cell as well.

Re: What does the nitrate do in a concentration cell?

Posted: Mon Feb 24, 2020 8:01 pm
by Angela Patel 2J
You can't just put gold ions in solution, you need it to be dissolved from another compound.

Re: What does the nitrate do in a concentration cell?

Posted: Mon Feb 24, 2020 8:34 pm
by Naneeta Desar 1K
In order to balance the charges nitrate flows through the porous disk.